Introduction
The Rheonik RHM 80 Coriolis Mass Flow Sensor is a robust, high-capacity Coriolis mass flowmeter engineered for precise measurement in extreme industrial environments where high temperatures, elevated pressures, and aggressive or corrosive media are present. Designed with heavy-duty construction and advanced sensor geometry, the Rheonik RHM 80 ensures stable and accurate performance under severe process conditions without compromising measurement integrity. Its superior mechanical strength and material flexibility make it suitable for demanding applications across oil & gas, chemical processing, and power generation sectors, where reliability, durability, and long-term operational stability are critical. The sensor maintains excellent mass flow accuracy and repeatability, even under fluctuating process conditions, while supporting a wide range of industrial standards and installation requirements.
- Flow Range: 80 kg/min up to 8000 kg/min, suitable for high-volume industrial processes
- Pressure Rating: Up to 341 bar (4945 psi), ensuring safe operation in high-pressure systems
- Temperature Range: -196°C (-321°F) to +350°C (662°F), ideal for cryogenic to high-temperature applications
- Measurement Accuracy: ±0.1% of rate, delivering high-precision mass flow measurement
- Material Options: SS 316L / SS 316Ti, Super Duplex (1.4410), Alloy C22 (2.4602) for enhanced corrosion resistance
- Process Connections: Available from 6″ to 6″, supporting standardized industrial piping configurations
General Specifications
| Nominal Flow (Qnom)* | 5000 kg/min (11023 lb/min) |
| Maximum Flow (Qmax)* | 8000 kg/min (17637 lb/min) |
| Typical Minimum Flow (Qmin)* | 100 kg/min (176 lb/min) |
| Operating Temperature | Fluid temperature range options cover applications from -196°C to +350°C (-320°F to +662°F). For integral transmitter versions, please refer to the transmitter datasheet |
| Ambient Temperature | -50°C to 80°C (-58°F to 176°F) |
| Pressure Ratings | Up to 341 bar / 4946 psi – dependent upon material |
| Electrical Connection Sensor w/o Integral Transmitter |
M20 x 1.5 standard cable entry for JM, SM terminal box versions |
| Sensor Enclosure Materials |
Stainless steel 304 (standard), SS 316 (optional) |
| Enclosure Type | Protection class IP66 / NEMA 4X with Standard Temperature Range (Option N1/NA); IP65 / NEMA 4 for Extended Temperature Ranges (Option E2 / E3 / H4) |
| Wetted Materials |
1.4571 (SS 316Ti), 1.4410 (SuperDuplex) – standard |
| Process Connections | Nearly any – the Rheonik AnyPipeFit Commitment. Consult factory for types/sizes not listed in this data sheet on the Mechanical Construction pages |
| Pressure Rating Compliance |
Europe – PED: Module A2, Module B3.1+C2 |
| Certifications and Approvals |
ATEX / IECEx Approvals for Zone 0, 1 (details see page 10) |
| Testing and Inspection | All sensors are hydro tested, calibrated and supplied with a traceable calibration certificate. Customized calibration and testing services are available |
| Project Documentation and QA, Services |
Rheonik offers a full set of services for large and complex engineering projects.
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| Options |
Enclosure heating for high temperature applications |
* At Qnom, the pressure drop across a parallel tube sensor will be approximately 0.4 bar (6 psi) for H2O. Sensors can be operated at higher flow rates up to Qmax, but the pressure drop will be higher. Typical Minimum Flow Qmin is the recommended lowest flow rate for an accurate measurement. Sensors will measure flow rates lower than Qmin, but uncertainty will increase beyond 1 % of the rate.
The flow rate specifications above relate to standard pressure, parallel tube, and manifold sensor versions. Models with higher pressure ratings have increased wall thickness and will have higher pressure drops.
Pressure Drop
At Qnom, the pressure drop across a parallel tube sensor will be approximately 1-3 bar (15-44 psi) for H2O. Sensors can be operated at higher flow rates, but the pressure drop will be higher. Qmin is the recommended lowest flow rate. Sensors will measure flow rates lower than Qmin, but uncertainty will increase beyond 0.5 % of the rate.
The flow specifications above relate to standard pressure, parallel tube, and manifold sensor versions. Models with higher pressure ratings have increased wall thickness and will have higher pressure drops.
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